The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지
DOI QR코드

DOI QR Code

Estimation of Fundamental Frequency Using an Instantaneous Frequency Based on the Symmetric Higher Order Differential Energy Operator

대칭구조를 갖는 일반적인 고차의 미분 에너지함수를 기반한 순간주파수를 이용한 음성의 기본주파수 추정

  • Received : 2011.06.03
  • Accepted : 2011.10.25
  • Published : 2011.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

The fundamental frequency of the voiced speech is estimated using the instantaneous frequency based on the symmetric higher order differential energy operator. The instantaneous frequency based on the symmetric higher order energy operator shows better frequency estimation result since it is aligned to the time instance of the signal. The speech is pre-processed by a lowpass filter to remove higher frequency components. Then, it is processed by the instantaneous frequency to obtain the fundamental frequency estimates. The symmetric higher order energy operator has been used as an indicator to determine the voiced/unvoiced speech. The fundamental frequency estimates are further processed by a moving average filter to obtain the monotonically changed estimates. The obtained fundamental frequency estimates have been compared with the spectrogram of the speech to confirm its accuracy.

Keywords

References

  1. L.R. Rabiner and R. W. Schafer, Digital Processing of Speech Signals, Englewood Cliffs, NJ: Prentice Hall, 1978.
  2. F. Hlawatsch and G. F. Boudreaux-Bartels, "Linear and quadratic time-frequency signal representations," IEEE Signal Processing Magazine, vol. 19, pp. 21-67, Apr. 1992.
  3. B. Boashash, "Estimating and interpreting the instantaneous frequency of a signal-Part 2: algorithms and applications," Proc. of the IEEE , vol. 80, pp. 540-568, Apr. 1992. https://doi.org/10.1109/5.135378
  4. L. Qiu, H. Yang, S. Koh, "Fundamental frequency determination based on instantaneous frequency estimation", Signal Processing, vol. 44, pp.233-241, 1995. https://doi.org/10.1016/0165-1684(95)00027-B
  5. P. Maragos, J. F. Kaiser, and T. F. Quatieri, "On amplitude and frequency demodulation using energy operators," IEEE Trans. Signal Processing, vol. 41, pp. 1532-1550, Apr. 1993. https://doi.org/10.1109/78.212729
  6. P. Maragos, and A. Potamianos, "Higher order differential energy operators," IEEE Signal Processing Letters, vol. 2, pp. 152-154, Aug. 1995. https://doi.org/10.1109/97.404130
  7. B. Iem, "An Instantaneous frequency estimators based on the symmetric higher order differential energy operator," IEICE Trans. Fundamentals, vol.E93-A, no. 1, pp. 227-232, Jan. 2010. https://doi.org/10.1587/transfun.E93.A.227
  8. D. G. Childers, Speech Processing and Synthesis Toolboxes, Wiley, September. 1999.